<template>
  <div class="login_container">
      <div class="login_box">
        <!-- 头像区域 -->
        <div class="avator_box">
          <img src="../assets/logo.png" alt="">
        </div>

        <!-- 表单区域 -->
        <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
          <el-form-item>
            <!-- 用户名 -->
            <el-form-item prop="username" class="form_item">
              <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user " placeholder="请输入用户名"></el-input>
            </el-form-item>

            <!-- 密码 -->
            <el-form-item prop="password" class="form_item">
              <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" placeholder="请输入密码"  show-password></el-input>
            </el-form-item>

            <!-- 按钮区域 -->
            <el-form-item class="btns form_item">
              <el-button type="primary" @click="validateLoginForm()">登录</el-button>
              <el-button type="info" @click="resetLoginForm()">重置</el-button>
            </el-form-item>
          </el-form-item>
        </el-form>
      </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证规则对象
      loginFormRules: {
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    validateLoginForm () {
      this.$refs.loginFormRef.validate(async vaild => {
        if (!vaild) return
        const { data: res } = await this.$http.post('login', this.loginForm)

        if (res.meta.status !== 200) return this.$message.error('登录失败')

        this.$message.success('登录成功')
        // 1.将登录成功后的 token 保存到客户端的 sessionStorage 中
        window.sessionStorage.setItem('token', res.data.token)

        // 2.通过编程式导航跳转主页,路由地址是 /home
        this.$router.push('/home')
      })
    },
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
}
.avator_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%,-50%);
  background-color: #fff;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.btns {
  display: flex;
  justify-content: flex-end;
}
.login_form {
  box-sizing: border-box;
  position: absolute;
  width: 100%;
  padding: 0 20px;
  bottom: 0;
}
.form_item {
  margin: 30px 0;
}
</style>
